Research Projects

Project at a Glance

Title: Measurement and modeling of PM10 and PM2.5 emissions from paved roads in California.

Principal Investigator / Author(s): Venkatram, Akula

Contractor: UC Riverside

Contract Number: 94-336

Research Program Area: Emissions Monitoring & Control, Atmospheric Processes

Topic Areas: Area Sources, Field Studies


This report describes the results from a two-year study to develop and evaluate a reliable method to estimate PM10 (particulate matter with an aerodynamic diameter of less than 10 Ķm) and PM2.5 emissions from paved roads. The study was motivated by two observations:

* Calculations made by the California Air Resources Board (Gaffney et al., 1996) suggest that PM10 emissions from paved roads constitute a major fraction of total primary emissions from urban areas in California. For example, in the Los Angeles South Coast Air Basin, automobile traffic on paved roads generates about 170 tons/day or 30 percent of the total of 640 tons/day of PM10 emissions.
* Currently used methods, described in AP-42, to estimate particulate emissions from paved roads are uncertain (Claiborn et al., 1995; Kantameni et al., 1996; Zimmer et al., 1992). Furthermore, because the emissions model is a purely statistical relationship between measured emission rates and silt loading, it has limited applicability to situations different from those used in its derivation.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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